View Full Version : A Antialiasing Question

03-11-06, 02:19 AM
Hi there
I am running a BFG 7800GTX OC card using 81.98 drivers
Normally I have Global Driver settings as 4X AA and 16X AF, ,but I noticed that in some games if you increase the AA to 8xS whilst leaving AF unchanged it actually improves frame rates significantly. Sometimes by 50pct.
I have a 19" Samsung LCD running 1280 x 1024

Can someone please explain why that is ??
I would have thought increasing would have the oppostite effect


03-13-06, 12:53 PM
Name the game(s)?


03-13-06, 04:26 PM
Are you sure it's working in those cases? Maybe it's disabled completely?

03-13-06, 04:34 PM
Yeah most likely 8xAA wasnt working in the games you tested.

03-13-06, 05:02 PM
That would be my guess also (nothing was being applied). 8xS should drop the framerate considerably.

03-17-06, 04:54 PM
You are correct guys

Ran Doom 3 with 4XAA and 8XSAA and got a 15fps drop when 8X isenabled
Ran an older game (Medal of Honor) and the reverse happened.
So obviously MOH does not support 8XSAA.
Though I thought I read once that OpenGL games do not support 8XS so perhaps running MOH was a waste of time.
Mind you nVidia claim that 8XS offer higher image quality than 4X, so I'm not so sure now
Anyway thanks for your replies